When a synchronized method calls other synchronized methods on same object, it does not create synchronization problems but it does have a detrimental effect on performance. This error is reported for non-static methods.

Example 1

     public class MyClass {
         public synchronized List getElements() {
             return internalGetElements();
         synchronized List internalGetElements() {
             List list = new ArrayList();
             // calculate and return list of elements
             return list;
         // ...

SYNCH.NESTED is reported for line 14: Synchronized method calls another synchronized method 'internalGetElements' with the same lock held